Someone doesn’t buy a 2015 BMW 640i xDrive Coupe 3.0L 6-cyl *because* of its 23 MPG combined. They buy it for the smooth rush of its turbocharged inline-six engine, the surefootedness of its all-wheel-drive system, the exquisitely crafted interior, and the presence it commands on the road. Fuel economy is a secondary concern, a trade-off accepted for the performance and luxury this car delivers. This buyer is looking for a statement, a grand tourer that blends athleticism with refinement, and they’re prepared to pay for it, both at the dealership and at the pump.

City and highway performance

The EPA estimates the 2015 BMW 640i xDrive Coupe at 20 MPG in the city and 29 MPG on the highway. That 20 MPG figure reflects the realities of stop-and-go driving. In these conditions, the engine works harder and the turbocharger spools up more frequently. The 29 MPG highway rating is more indicative of its long-distance cruising ability, where the eight-speed automatic transmission allows the engine to settle into a relaxed and efficient rhythm.

Expect the highway number to drop if you’re frequently engaging the sport mode and demanding bursts of acceleration for passing, but overall these numbers represent its performance capabilities.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2015 BMW 640i xDrive Coupe at $2,500. This figure is based on driving 15,000 miles per year, using the national average fuel price at the time of calculation.

Your actual fuel cost will vary depending on your driving habits, the type of driving you do (city vs. highway), and the prevailing fuel prices in your area. Aggressive driving, frequent short trips, and premium fuel prices will all push that annual cost higher, while a more conservative driving style and predominantly highway miles will reduce it. It’s a benchmark figure, allowing potential buyers to quickly assess the potential cost of ownership.

Real-world expectations

While the EPA provides standardized testing figures, real-world fuel economy can vary significantly based on individual driving styles and conditions.

Owners report figures ranging from the high teens to the low 30s, depending on their mix of city and highway driving and how often they exploit the engine’s performance potential. It’s crucial to remember that the 640i xDrive Coupe is not designed for maximizing fuel efficiency. It’s a performance-oriented machine that rewards enthusiastic driving, and that naturally impacts fuel consumption. Those who prioritize efficiency above all else might want to consider alternative vehicles, but for those who value the blend of performance and luxury, the real-world fuel economy is an acceptable compromise.

How it compares

In the competitive realm of luxury coupes, the 2015 BMW 640i xDrive Coupe sits in a fuel economy middle ground. A similarly-equipped Audi A7 3.0T quattro, for example, gets 20 MPG city and 30 MPG highway, which is slightly better on the highway. A Mercedes-Benz CLS400 4MATIC manages around 21 MPG city and 30 MPG highway, also edging out the BMW. These differences, though seemingly small, can add up over time.

Compared to thirstier V8-powered alternatives, like the BMW 650i xDrive (16 MPG city/24 MPG highway), the 640i offers a more sensible balance of performance and efficiency. For buyers considering all Bmw fuel economy data, this car represents a sweet spot in the lineup, offering strong performance without the worst fuel economy penalties. Looking into the 640I MPG across all years could also reveal trends and offer insight into changes in efficiency across the model’s lifespan.

Tips to maximize efficiency

Take advantage of the Driving Dynamics Control system. Selecting “Eco Pro” mode adjusts the throttle response, transmission shift points, and climate control settings to prioritize fuel efficiency. Remember that even a small reduction in performance can lead to noticeable fuel savings over time.

Maintain a steady speed on the highway. The BMW’s cruise control system can help you maintain a consistent pace, minimizing unnecessary acceleration and deceleration, which can significantly impact fuel consumption. Anticipate traffic flow and avoid abrupt braking by looking far ahead.

Check your tire pressure regularly. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Adhere to the recommended tire pressure specifications, which can be found on the driver’s side doorjamb or in the owner’s manual.

Avoid unnecessary idling. If you’re stopped for more than a minute, turn off the engine. Modern engines restart quickly and efficiently, and idling wastes fuel. It might not seem like much in the moment, but idling adds up over time and contributes to lower overall fuel economy.

Lighten the load. Remove any unnecessary items from the trunk or rear seats. Extra weight increases the strain on the engine, reducing fuel efficiency. Streamlining the vehicle’s profile by removing roof racks when not in use also helps reduce drag and improve mileage.